x86: Refactor PIRQ routing support
PIRQ routing is pretty much common in Intel chipset. It has several PIRQ links (normally 8) and corresponding registers (either in PCI configuration space or memory-mapped IBASE) to configure the legacy 8259 IRQ vector mapping. Refactor current Queensbay PIRQ routing support using device tree and move it to a common place, so that we can easily add PIRQ routing support on a new platform. Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Acked-by: Simon Glass <sjg@chromium.org>utp
Bin Meng
Simon Glass
parent
2aa3a7fb1c
commit
9c7dea602e
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@ -19,7 +19,7 @@ obj-$(CONFIG_NORTHBRIDGE_INTEL_SANDYBRIDGE) += ivybridge/
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obj-$(CONFIG_NORTHBRIDGE_INTEL_IVYBRIDGE) += ivybridge/
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obj-$(CONFIG_INTEL_QUARK) += quark/
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obj-$(CONFIG_INTEL_QUEENSBAY) += queensbay/
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obj-y += lapic.o
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obj-y += irq.o lapic.o
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obj-$(CONFIG_SMP) += mp_init.o
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obj-y += mtrr.o
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obj-$(CONFIG_PCI) += pci.o
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@ -0,0 +1,213 @@
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/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <fdtdec.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <asm/irq.h>
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#include <asm/pci.h>
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#include <asm/pirq_routing.h>
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DECLARE_GLOBAL_DATA_PTR;
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static struct irq_router irq_router;
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static struct irq_routing_table *pirq_routing_table;
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bool pirq_check_irq_routed(int link, u8 irq)
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{
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u8 pirq;
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int base = irq_router.link_base;
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if (irq_router.config == PIRQ_VIA_PCI)
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pirq = x86_pci_read_config8(irq_router.bdf,
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LINK_N2V(link, base));
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else
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pirq = readb(irq_router.ibase + LINK_N2V(link, base));
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pirq &= 0xf;
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/* IRQ# 0/1/2/8/13 are reserved */
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if (pirq < 3 || pirq == 8 || pirq == 13)
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return false;
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return pirq == irq ? true : false;
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}
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int pirq_translate_link(int link)
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{
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return LINK_V2N(link, irq_router.link_base);
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}
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void pirq_assign_irq(int link, u8 irq)
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{
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int base = irq_router.link_base;
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/* IRQ# 0/1/2/8/13 are reserved */
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if (irq < 3 || irq == 8 || irq == 13)
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return;
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if (irq_router.config == PIRQ_VIA_PCI)
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x86_pci_write_config8(irq_router.bdf,
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LINK_N2V(link, base), irq);
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else
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writeb(irq, irq_router.ibase + LINK_N2V(link, base));
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}
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static inline void fill_irq_info(struct irq_info **slotp, int *entries, u8 bus,
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u8 device, u8 func, u8 pin, u8 pirq)
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{
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struct irq_info *slot = *slotp;
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slot->bus = bus;
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slot->devfn = (device << 3) | func;
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slot->irq[pin - 1].link = LINK_N2V(pirq, irq_router.link_base);
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slot->irq[pin - 1].bitmap = irq_router.irq_mask;
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(*entries)++;
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(*slotp)++;
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}
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__weak void cpu_irq_init(void)
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{
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return;
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}
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static int create_pirq_routing_table(void)
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{
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const void *blob = gd->fdt_blob;
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struct fdt_pci_addr addr;
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int node;
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int len, count;
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const u32 *cell;
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struct irq_routing_table *rt;
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struct irq_info *slot;
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int irq_entries = 0;
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int i;
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int ret;
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node = fdtdec_next_compatible(blob, 0, COMPAT_INTEL_IRQ_ROUTER);
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if (node < 0) {
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debug("%s: Cannot find irq router node\n", __func__);
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return -EINVAL;
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}
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ret = fdtdec_get_pci_addr(blob, node, FDT_PCI_SPACE_CONFIG,
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"reg", &addr);
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if (ret)
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return ret;
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/* extract the bdf from fdt_pci_addr */
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irq_router.bdf = addr.phys_hi & 0xffff00;
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ret = fdt_find_string(blob, node, "intel,pirq-config", "pci");
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if (!ret) {
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irq_router.config = PIRQ_VIA_PCI;
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} else {
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ret = fdt_find_string(blob, node, "intel,pirq-config", "ibase");
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if (!ret)
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irq_router.config = PIRQ_VIA_IBASE;
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else
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return -EINVAL;
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}
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ret = fdtdec_get_int_array(blob, node, "intel,pirq-link",
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&irq_router.link_base, 1);
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if (ret)
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return ret;
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irq_router.irq_mask = fdtdec_get_int(blob, node,
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"intel,pirq-mask", PIRQ_BITMAP);
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if (irq_router.config == PIRQ_VIA_IBASE) {
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int ibase_off;
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ibase_off = fdtdec_get_int(blob, node, "intel,ibase-offset", 0);
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if (!ibase_off)
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return -EINVAL;
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/*
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* Here we assume that the IBASE register has already been
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* properly configured by U-Boot before.
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*
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* By 'valid' we mean:
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* 1) a valid memory space carved within system memory space
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* assigned to IBASE register block.
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* 2) memory range decoding is enabled.
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* Hence we don't do any santify test here.
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*/
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irq_router.ibase = x86_pci_read_config32(irq_router.bdf,
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ibase_off);
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irq_router.ibase &= ~0xf;
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}
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cell = fdt_getprop(blob, node, "intel,pirq-routing", &len);
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if (!cell)
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return -EINVAL;
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if ((len % sizeof(struct pirq_routing)) == 0)
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count = len / sizeof(struct pirq_routing);
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else
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return -EINVAL;
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rt = malloc(sizeof(struct irq_routing_table));
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if (!rt)
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return -ENOMEM;
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memset((char *)rt, 0, sizeof(struct irq_routing_table));
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/* Populate the PIRQ table fields */
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rt->signature = PIRQ_SIGNATURE;
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rt->version = PIRQ_VERSION;
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rt->rtr_bus = 0;
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rt->rtr_devfn = (PCI_DEV(irq_router.bdf) << 3) |
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PCI_FUNC(irq_router.bdf);
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rt->rtr_vendor = PCI_VENDOR_ID_INTEL;
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rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31;
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slot = rt->slots;
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/* Now fill in the irq_info entries in the PIRQ table */
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for (i = 0; i < count; i++) {
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struct pirq_routing pr;
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pr.bdf = fdt_addr_to_cpu(cell[0]);
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pr.pin = fdt_addr_to_cpu(cell[1]);
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pr.pirq = fdt_addr_to_cpu(cell[2]);
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debug("irq_info %d: b.d.f %x.%x.%x INT%c PIRQ%c\n",
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i, PCI_BUS(pr.bdf), PCI_DEV(pr.bdf),
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PCI_FUNC(pr.bdf), 'A' + pr.pin - 1,
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'A' + pr.pirq);
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fill_irq_info(&slot, &irq_entries, PCI_BUS(pr.bdf),
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PCI_DEV(pr.bdf), PCI_FUNC(pr.bdf),
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pr.pin, pr.pirq);
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cell += sizeof(struct pirq_routing) / sizeof(u32);
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}
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rt->size = irq_entries * sizeof(struct irq_info) + 32;
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pirq_routing_table = rt;
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return 0;
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}
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void pirq_init(void)
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{
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cpu_irq_init();
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if (create_pirq_routing_table()) {
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debug("Failed to create pirq routing table\n");
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} else {
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/* Route PIRQ */
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pirq_route_irqs(pirq_routing_table->slots,
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get_irq_slot_count(pirq_routing_table));
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}
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}
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u32 write_pirq_routing_table(u32 addr)
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{
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return copy_pirq_routing_table(addr, pirq_routing_table);
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}
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@ -5,5 +5,5 @@
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#
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obj-y += fsp_configs.o
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obj-y += irq.o tnc.o topcliff.o
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obj-y += tnc.o topcliff.o
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obj-$(CONFIG_PCI) += tnc_pci.o
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@ -1,242 +0,0 @@
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/*
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* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <errno.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <asm/pci.h>
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#include <asm/post.h>
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#include <asm/processor.h>
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#include <asm/pirq_routing.h>
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#include <asm/arch/device.h>
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#include <asm/arch/tnc.h>
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#include <asm/arch/irq.h>
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static struct irq_routing_table *pirq_routing_table;
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bool pirq_check_irq_routed(int link, u8 irq)
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{
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u8 pirq;
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pirq = x86_pci_read_config8(TNC_LPC, LINK_N2V(link));
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pirq &= 0xf;
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/* IRQ# 0/1/2/8/13 are reserved */
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if (pirq < 3 || pirq == 8 || pirq == 13)
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return false;
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return pirq == irq ? true : false;
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}
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int pirq_translate_link(int link)
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{
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return LINK_V2N(link);
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}
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void pirq_assign_irq(int link, u8 irq)
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{
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/* IRQ# 0/1/2/8/13 are reserved */
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if (irq < 3 || irq == 8 || irq == 13)
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return;
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x86_pci_write_config8(TNC_LPC, LINK_N2V(link), irq);
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}
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static inline void fill_irq_info(struct irq_info **slotp, int *entries, u8 bus,
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u8 device, u8 func, u8 pin, u8 pirq)
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{
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struct irq_info *slot = *slotp;
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slot->bus = bus;
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slot->devfn = (device << 3) | func;
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slot->irq[pin - 1].link = LINK_N2V(pirq);
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slot->irq[pin - 1].bitmap = PIRQ_BITMAP;
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(*entries)++;
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(*slotp)++;
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}
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/* PCIe port downstream INTx swizzle */
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static inline u8 pin_swizzle(u8 pin, int port)
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{
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return (pin + port) % 4;
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}
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__weak int board_fill_irq_info(struct irq_info *slot)
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{
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return 0;
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}
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static int create_pirq_routing_table(void)
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{
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struct irq_routing_table *rt;
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struct irq_info *slot;
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int irq_entries = 0;
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pci_dev_t tcf_bdf;
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u8 tcf_bus, bus;
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int i;
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rt = malloc(sizeof(struct irq_routing_table));
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if (!rt)
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return -ENOMEM;
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memset((char *)rt, 0, sizeof(struct irq_routing_table));
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/* Populate the PIRQ table fields */
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rt->signature = PIRQ_SIGNATURE;
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rt->version = PIRQ_VERSION;
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rt->rtr_bus = 0;
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rt->rtr_devfn = (TNC_LPC_DEV << 3) | TNC_LPC_FUNC;
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rt->rtr_vendor = PCI_VENDOR_ID_INTEL;
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rt->rtr_device = PCI_DEVICE_ID_INTEL_ICH7_31;
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slot = rt->slots;
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/*
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* Now fill in the irq_info entries in the PIRQ table
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*
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* We start from internal TunnelCreek PCI devices first, then
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* followed by all the 4 PCIe ports downstream devices, including
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* the Queensbay platform Topcliff chipset devices.
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*/
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fill_irq_info(&slot, &irq_entries, 0, TNC_IGD_DEV,
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TNC_IGD_FUNC, INTA, PIRQE);
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fill_irq_info(&slot, &irq_entries, 0, TNC_SDVO_DEV,
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TNC_SDVO_FUNC, INTA, PIRQF);
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fill_irq_info(&slot, &irq_entries, 0, TNC_HDA_DEV,
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TNC_HDA_FUNC, INTA, PIRQG);
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fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE0_DEV,
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TNC_PCIE0_FUNC, INTA, PIRQE);
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fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE1_DEV,
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TNC_PCIE1_FUNC, INTA, PIRQF);
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fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE2_DEV,
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TNC_PCIE2_FUNC, INTA, PIRQG);
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fill_irq_info(&slot, &irq_entries, 0, TNC_PCIE3_DEV,
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TNC_PCIE3_FUNC, INTA, PIRQH);
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/* Check which PCIe port the Topcliff chipset is connected to */
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tcf_bdf = pci_find_device(PCI_VENDOR_ID_INTEL, 0x8800, 0);
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tcf_bus = PCI_BUS(tcf_bdf);
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for (i = 0; i < 4; i++) {
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bus = x86_pci_read_config8(PCI_BDF(0, TNC_PCIE0_DEV + i, 0),
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PCI_SECONDARY_BUS);
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if (bus == tcf_bus)
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break;
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}
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/* Fill in the Topcliff chipset devices' irq info */
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if (i < 4) {
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_PCIE_PORT_DEV,
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TCF_PCIE_PORT_FUNC, INTA, pin_swizzle(PIRQA, i));
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tcf_bus++;
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0,
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TCF_GBE_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_0,
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TCF_GPIO_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
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TCF_USB1_OHCI0_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
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TCF_USB1_OHCI1_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
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TCF_USB1_OHCI2_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
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TCF_USB1_EHCI_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_2,
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TCF_USB_DEVICE_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4,
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TCF_SDIO0_FUNC, INTC, pin_swizzle(PIRQC, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_4,
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TCF_SDIO1_FUNC, INTC, pin_swizzle(PIRQC, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_6,
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TCF_SATA_FUNC, INTD, pin_swizzle(PIRQD, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
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TCF_USB2_OHCI0_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
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TCF_USB2_OHCI1_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
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TCF_USB2_OHCI2_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_8,
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TCF_USB2_EHCI_FUNC, INTA, pin_swizzle(PIRQA, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
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TCF_DMA1_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
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TCF_UART0_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
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TCF_UART1_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
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TCF_UART2_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_10,
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TCF_UART3_FUNC, INTB, pin_swizzle(PIRQB, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
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TCF_DMA2_FUNC, INTC, pin_swizzle(PIRQC, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
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TCF_SPI_FUNC, INTC, pin_swizzle(PIRQC, i));
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fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
|
||||
TCF_I2C_FUNC, INTC, pin_swizzle(PIRQC, i));
|
||||
fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
|
||||
TCF_CAN_FUNC, INTC, pin_swizzle(PIRQC, i));
|
||||
fill_irq_info(&slot, &irq_entries, tcf_bus, TCF_DEV_12,
|
||||
TCF_1588_FUNC, INTC, pin_swizzle(PIRQC, i));
|
||||
}
|
||||
|
||||
/* Call board-specific routine to fill in add-in card's irq info */
|
||||
irq_entries += board_fill_irq_info(slot);
|
||||
|
||||
rt->size = irq_entries * sizeof(struct irq_info) + 32;
|
||||
|
||||
pirq_routing_table = rt;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void pirq_init(void)
|
||||
{
|
||||
struct tnc_rcba *rcba;
|
||||
u32 base;
|
||||
|
||||
base = x86_pci_read_config32(TNC_LPC, LPC_RCBA);
|
||||
base &= ~MEM_BAR_EN;
|
||||
rcba = (struct tnc_rcba *)base;
|
||||
|
||||
/* Make sure all internal PCI devices are using INTA */
|
||||
writel(INTA, &rcba->d02ip);
|
||||
writel(INTA, &rcba->d03ip);
|
||||
writel(INTA, &rcba->d27ip);
|
||||
writel(INTA, &rcba->d31ip);
|
||||
writel(INTA, &rcba->d23ip);
|
||||
writel(INTA, &rcba->d24ip);
|
||||
writel(INTA, &rcba->d25ip);
|
||||
writel(INTA, &rcba->d26ip);
|
||||
|
||||
/*
|
||||
* Route TunnelCreek PCI device interrupt pin to PIRQ
|
||||
*
|
||||
* Since PCIe downstream ports received INTx are routed to PIRQ
|
||||
* A/B/C/D directly and not configurable, we route internal PCI
|
||||
* device's INTx to PIRQ E/F/G/H.
|
||||
*/
|
||||
writew(PIRQE, &rcba->d02ir);
|
||||
writew(PIRQF, &rcba->d03ir);
|
||||
writew(PIRQG, &rcba->d27ir);
|
||||
writew(PIRQH, &rcba->d31ir);
|
||||
writew(PIRQE, &rcba->d23ir);
|
||||
writew(PIRQF, &rcba->d24ir);
|
||||
writew(PIRQG, &rcba->d25ir);
|
||||
writew(PIRQH, &rcba->d26ir);
|
||||
|
||||
if (create_pirq_routing_table()) {
|
||||
debug("Failed to create pirq routing table\n");
|
||||
} else {
|
||||
/* Route PIRQ */
|
||||
pirq_route_irqs(pirq_routing_table->slots,
|
||||
get_irq_slot_count(pirq_routing_table));
|
||||
}
|
||||
}
|
||||
|
||||
u32 write_pirq_routing_table(u32 addr)
|
||||
{
|
||||
return copy_pirq_routing_table(addr, pirq_routing_table);
|
||||
}
|
||||
|
|
@ -6,10 +6,11 @@
|
|||
|
||||
#include <common.h>
|
||||
#include <asm/io.h>
|
||||
#include <asm/irq.h>
|
||||
#include <asm/pci.h>
|
||||
#include <asm/post.h>
|
||||
#include <asm/arch/device.h>
|
||||
#include <asm/arch/irq.h>
|
||||
#include <asm/arch/tnc.h>
|
||||
#include <asm/fsp/fsp_support.h>
|
||||
#include <asm/processor.h>
|
||||
|
||||
|
|
@ -45,6 +46,42 @@ int arch_cpu_init(void)
|
|||
return 0;
|
||||
}
|
||||
|
||||
void cpu_irq_init(void)
|
||||
{
|
||||
struct tnc_rcba *rcba;
|
||||
u32 base;
|
||||
|
||||
base = x86_pci_read_config32(TNC_LPC, LPC_RCBA);
|
||||
base &= ~MEM_BAR_EN;
|
||||
rcba = (struct tnc_rcba *)base;
|
||||
|
||||
/* Make sure all internal PCI devices are using INTA */
|
||||
writel(INTA, &rcba->d02ip);
|
||||
writel(INTA, &rcba->d03ip);
|
||||
writel(INTA, &rcba->d27ip);
|
||||
writel(INTA, &rcba->d31ip);
|
||||
writel(INTA, &rcba->d23ip);
|
||||
writel(INTA, &rcba->d24ip);
|
||||
writel(INTA, &rcba->d25ip);
|
||||
writel(INTA, &rcba->d26ip);
|
||||
|
||||
/*
|
||||
* Route TunnelCreek PCI device interrupt pin to PIRQ
|
||||
*
|
||||
* Since PCIe downstream ports received INTx are routed to PIRQ
|
||||
* A/B/C/D directly and not configurable, we route internal PCI
|
||||
* device's INTx to PIRQ E/F/G/H.
|
||||
*/
|
||||
writew(PIRQE, &rcba->d02ir);
|
||||
writew(PIRQF, &rcba->d03ir);
|
||||
writew(PIRQG, &rcba->d27ir);
|
||||
writew(PIRQH, &rcba->d31ir);
|
||||
writew(PIRQE, &rcba->d23ir);
|
||||
writew(PIRQF, &rcba->d24ir);
|
||||
writew(PIRQG, &rcba->d25ir);
|
||||
writew(PIRQH, &rcba->d26ir);
|
||||
}
|
||||
|
||||
int arch_misc_init(void)
|
||||
{
|
||||
pirq_init();
|
||||
|
|
|
|||
|
|
@ -6,6 +6,8 @@
|
|||
|
||||
/dts-v1/;
|
||||
|
||||
#include <dt-bindings/interrupt-router/intel-irq.h>
|
||||
|
||||
/include/ "skeleton.dtsi"
|
||||
/include/ "serial.dtsi"
|
||||
|
||||
|
|
@ -135,6 +137,58 @@
|
|||
};
|
||||
};
|
||||
};
|
||||
|
||||
irq-router@1f,0 {
|
||||
reg = <0x0000f800 0 0 0 0>;
|
||||
compatible = "intel,irq-router";
|
||||
intel,pirq-config = "pci";
|
||||
intel,pirq-link = <0x60 8>;
|
||||
intel,pirq-mask = <0xdee0>;
|
||||
intel,pirq-routing = <
|
||||
/* TunnelCreek PCI devices */
|
||||
PCI_BDF(0, 2, 0) INTA PIRQE
|
||||
PCI_BDF(0, 3, 0) INTA PIRQF
|
||||
PCI_BDF(0, 23, 0) INTA PIRQE
|
||||
PCI_BDF(0, 24, 0) INTA PIRQF
|
||||
PCI_BDF(0, 25, 0) INTA PIRQG
|
||||
PCI_BDF(0, 26, 0) INTA PIRQH
|
||||
PCI_BDF(0, 27, 0) INTA PIRQG
|
||||
/*
|
||||
* Topcliff PCI devices
|
||||
*
|
||||
* Note on the Crown Bay board, Topcliff chipset
|
||||
* is connected to TunnelCreek PCIe port 0, so
|
||||
* its bus number is 1 for its PCIe port and 2
|
||||
* for its PCI devices per U-Boot currnet PCI
|
||||
* bus enumeration algorithm.
|
||||
*/
|
||||
PCI_BDF(1, 0, 0) INTA PIRQA
|
||||
PCI_BDF(2, 0, 1) INTA PIRQA
|
||||
PCI_BDF(2, 0, 2) INTA PIRQA
|
||||
PCI_BDF(2, 2, 0) INTB PIRQB
|
||||
PCI_BDF(2, 2, 1) INTB PIRQB
|
||||
PCI_BDF(2, 2, 2) INTB PIRQB
|
||||
PCI_BDF(2, 2, 3) INTB PIRQB
|
||||
PCI_BDF(2, 2, 4) INTB PIRQB
|
||||
PCI_BDF(2, 4, 0) INTC PIRQC
|
||||
PCI_BDF(2, 4, 1) INTC PIRQC
|
||||
PCI_BDF(2, 6, 0) INTD PIRQD
|
||||
PCI_BDF(2, 8, 0) INTA PIRQA
|
||||
PCI_BDF(2, 8, 1) INTA PIRQA
|
||||
PCI_BDF(2, 8, 2) INTA PIRQA
|
||||
PCI_BDF(2, 8, 3) INTA PIRQA
|
||||
PCI_BDF(2, 10, 0) INTB PIRQB
|
||||
PCI_BDF(2, 10, 1) INTB PIRQB
|
||||
PCI_BDF(2, 10, 2) INTB PIRQB
|
||||
PCI_BDF(2, 10, 3) INTB PIRQB
|
||||
PCI_BDF(2, 10, 4) INTB PIRQB
|
||||
PCI_BDF(2, 12, 0) INTC PIRQC
|
||||
PCI_BDF(2, 12, 1) INTC PIRQC
|
||||
PCI_BDF(2, 12, 2) INTC PIRQC
|
||||
PCI_BDF(2, 12, 3) INTC PIRQC
|
||||
PCI_BDF(2, 12, 4) INTC PIRQC
|
||||
>;
|
||||
};
|
||||
};
|
||||
|
||||
};
|
||||
|
|
|
|||
|
|
@ -1,55 +0,0 @@
|
|||
/*
|
||||
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
#ifndef _ARCH_IRQ_H_
|
||||
#define _ARCH_IRQ_H_
|
||||
|
||||
enum pci_int_pin {
|
||||
INTX,
|
||||
INTA,
|
||||
INTB,
|
||||
INTC,
|
||||
INTD
|
||||
};
|
||||
|
||||
enum pirq_pin {
|
||||
PIRQA,
|
||||
PIRQB,
|
||||
PIRQC,
|
||||
PIRQD,
|
||||
PIRQE,
|
||||
PIRQF,
|
||||
PIRQG,
|
||||
PIRQH
|
||||
};
|
||||
|
||||
/* PIRQ link number and value conversion */
|
||||
#define LINK_V2N(link) (link - 0x60)
|
||||
#define LINK_N2V(link) (link + 0x60)
|
||||
|
||||
#define PIRQ_BITMAP 0xdee0
|
||||
|
||||
struct irq_info;
|
||||
|
||||
/**
|
||||
* board_fill_irq_info() - Board-specific irq_info fill routine
|
||||
*
|
||||
* This fills the irq_info table for any board-specific add-in cards.
|
||||
*
|
||||
* @slot: pointer to the struct irq_info that is to be filled in
|
||||
* @return: number of entries were written to the struct irq_info
|
||||
*/
|
||||
int board_fill_irq_info(struct irq_info *slot);
|
||||
|
||||
/**
|
||||
* pirq_init() - Initialize platform PIRQ routing
|
||||
*
|
||||
* This initializes the PIRQ routing on the platform and configures all PCI
|
||||
* devices' interrupt line register to a working IRQ number on the 8259 PIC.
|
||||
*/
|
||||
void pirq_init(void);
|
||||
|
||||
#endif /* _ARCH_IRQ_H_ */
|
||||
|
|
@ -0,0 +1,76 @@
|
|||
/*
|
||||
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
#ifndef _ARCH_IRQ_H_
|
||||
#define _ARCH_IRQ_H_
|
||||
|
||||
#include <dt-bindings/interrupt-router/intel-irq.h>
|
||||
|
||||
/**
|
||||
* Intel interrupt router configuration mechanism
|
||||
*
|
||||
* There are two known ways of Intel interrupt router configuration mechanism
|
||||
* so far. On most cases, the IRQ routing configuraiton is controlled by PCI
|
||||
* configuraiton registers on the legacy bridge, normally PCI BDF(0, 31, 0).
|
||||
* On some newer platforms like BayTrail and Braswell, the IRQ routing is now
|
||||
* in the IBASE register block where IBASE is memory-mapped.
|
||||
*/
|
||||
enum pirq_config {
|
||||
PIRQ_VIA_PCI,
|
||||
PIRQ_VIA_IBASE
|
||||
};
|
||||
|
||||
/**
|
||||
* Intel interrupt router control block
|
||||
*
|
||||
* Its members' value will be filled in based on device tree's input.
|
||||
*
|
||||
* @config: PIRQ_VIA_PCI or PIRQ_VIA_IBASE
|
||||
* @link_base: link value base number
|
||||
* @irq_mask: IRQ mask reprenting the 16 IRQs in 8259, bit N is 1 means
|
||||
* IRQ N is available to be routed
|
||||
* @lb_bdf: irq router's PCI bus/device/function number encoding
|
||||
* @ibase: IBASE register block base address
|
||||
*/
|
||||
struct irq_router {
|
||||
int config;
|
||||
u32 link_base;
|
||||
u16 irq_mask;
|
||||
u32 bdf;
|
||||
u32 ibase;
|
||||
};
|
||||
|
||||
struct pirq_routing {
|
||||
int bdf;
|
||||
int pin;
|
||||
int pirq;
|
||||
};
|
||||
|
||||
/* PIRQ link number and value conversion */
|
||||
#define LINK_V2N(link, base) (link - base)
|
||||
#define LINK_N2V(link, base) (link + base)
|
||||
|
||||
#define PIRQ_BITMAP 0xdef8
|
||||
|
||||
/**
|
||||
* cpu_irq_init() - Initialize CPU IRQ routing
|
||||
*
|
||||
* This initializes some platform-specific registers related to IRQ routing,
|
||||
* like configuring internal PCI devices to use which PCI interrupt pin,
|
||||
* and which PCI interrupt pin is mapped to which PIRQ line. Note on some
|
||||
* platforms, such IRQ routing might be hard-coded thus cannot configure.
|
||||
*/
|
||||
void cpu_irq_init(void);
|
||||
|
||||
/**
|
||||
* pirq_init() - Initialize platform PIRQ routing
|
||||
*
|
||||
* This initializes the PIRQ routing on the platform and configures all PCI
|
||||
* devices' interrupt line register to a working IRQ number on the 8259 PIC.
|
||||
*/
|
||||
void pirq_init(void);
|
||||
|
||||
#endif /* _ARCH_IRQ_H_ */
|
||||
|
|
@ -0,0 +1,31 @@
|
|||
/*
|
||||
* Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
|
||||
*
|
||||
* SPDX-License-Identifier: GPL-2.0+
|
||||
*/
|
||||
|
||||
#ifndef _DT_BINDINGS_INTEL_IRQ_H_
|
||||
#define _DT_BINDINGS_INTEL_IRQ_H_
|
||||
|
||||
/* PCI interrupt pin */
|
||||
#define INTA 1
|
||||
#define INTB 2
|
||||
#define INTC 3
|
||||
#define INTD 4
|
||||
|
||||
/* PIRQs */
|
||||
#define PIRQA 0
|
||||
#define PIRQB 1
|
||||
#define PIRQC 2
|
||||
#define PIRQD 3
|
||||
#define PIRQE 4
|
||||
#define PIRQF 5
|
||||
#define PIRQG 6
|
||||
#define PIRQH 7
|
||||
|
||||
/* PCI bdf encoding */
|
||||
#ifndef PCI_BDF
|
||||
#define PCI_BDF(b, d, f) ((b) << 16 | (d) << 11 | (f) << 8)
|
||||
#endif
|
||||
|
||||
#endif /* _DT_BINDINGS_INTEL_IRQ_H_ */
|
||||
|
|
@ -178,6 +178,7 @@ enum fdt_compat_id {
|
|||
COMPAT_INTEL_QRK_MRC, /* Intel Quark MRC */
|
||||
COMPAT_SOCIONEXT_XHCI, /* Socionext UniPhier xHCI */
|
||||
COMPAT_INTEL_PCH, /* Intel PCH */
|
||||
COMPAT_INTEL_IRQ_ROUTER, /* Intel Interrupt Router */
|
||||
|
||||
COMPAT_COUNT,
|
||||
};
|
||||
|
|
|
|||
|
|
@ -77,6 +77,7 @@ static const char * const compat_names[COMPAT_COUNT] = {
|
|||
COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),
|
||||
COMPAT(SOCIONEXT_XHCI, "socionext,uniphier-xhci"),
|
||||
COMPAT(COMPAT_INTEL_PCH, "intel,bd82x6x"),
|
||||
COMPAT(COMPAT_INTEL_IRQ_ROUTER, "intel,irq-router"),
|
||||
};
|
||||
|
||||
const char *fdtdec_get_compatible(enum fdt_compat_id id)
|
||||
|
|
|
|||
Loading…
Reference in New Issue